Unit 6 Matter: Concept 3 States of Matter

What is thermal energy?

• The heat in an object

• The sum of the kinetic and potential energy of particles in an object

• The energy due to temperature alone

• The energy stored within chemical bonds

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What does kinetic energy refer to?

• Energy due to position

• Energy in motion

• Energy stored as heat

• Energy released during a reaction

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What is potential energy?

• Energy of particles due to their motion

• Energy due to temperature changes

• Stored energy

• Energy due to light

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How are changes in matter related to energy?

• Through chemical reactions only

• By the motion of particles within it causing physical state changes

• By the absorption of light

• Through electrical charges

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According to the Kinetic Molecular Theory, what is all matter made of?

• Cells

• Atoms, ions, molecules, etc.

• Energy packets

• Waves

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What characterizes the motion of particles in the Kinetic Molecular Theory?

• Linear and predictable

• Static and unmoving

• Constant random motion

• Circular and confined

What does the motion of particles cause according to the Kinetic Molecular Theory?

• Particles to freeze

• Particles to expand

• Particles to change state

• Particles to collide with each other and the container

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What does temperature measure in an object?

• The total amount of heat energy

• The average kinetic energy of particles

• The potential energy of particles

• The specific heat capacity

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As the temperature of an object increases, what happens to the kinetic energy of its particles?

• It decreases

• It remains constant

• It increases

• It becomes zero

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How does the motion of particles in solids compare to that in gases at the same temperature?

• Particles in solids move faster than in gases

• Particles in solids and gases move at the same speed

• Particles in solids move slower than in gases

• Particles in solids do not move